删除表teacher(id,name,gender,birthday,score)中id为4的老师( ) A: delete from teacher; B: delete from teacher where id = 4; C: delete teacher where id = 4; D: drop from teacher where id = 4;

智慧职教: 表结构如下：teacher(tid,tname),course(cid,cname,teacher_id),查询所有课程的名称及任课老师姓名。

已知js文件中有:[img=257x178]17e0b9599341910.jpg[/img]想在wxml页面上显示张老师的id号,<;view>;{{x}}<;/view>;代码中x的位置应该如何写? A: teacher[1].id B: teacher.id[1] C: teacher[0].id D: teacher.id[0]

为表t_teacher中的teacher_id设置为主键。

【单选题】假设已经定义好了一个类teacher,现在要定义类dteacher,它是从teacher保护派生的,定义正确的是()。 A. class teacher::teacher protected{…} B. class teacher::teacher public{…} C. class teacher:: protected teacher{…} D. class teacher::public teacher{…}

6 The students met their 'English teacher/English 'teacher on the street. A: 'English teacher B: English'teacher

__1__ The teacher is always nervous. __2__ The teacher is kind and patient. __3__ The teacher is nice-looking. __4__ The teacher is hard-working.

Mr. Li is ____ as Mr. Wang. A: a good teacher B: an as good teacher C: as good a teacher D: as a good teacher

以下新建对象的语句中,正确的一项是( )。 A: Teacher t; B: Teacher t=new<br/>Teacher (); C: Teacher (t)=new<br/>Teacher (); D: Teacher (t);

In front of the classroom______. A: is the table for the teacher B: B. the table is there for the teacher C: it is a table for the teacher D: D. has a table for the teacher